1 | SUBROUTINE asselin_filter |
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2 | |
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3 | !------------------------------------------------------------------------------! |
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4 | ! Current revisions: |
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5 | ! ----------------- |
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6 | ! |
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7 | ! |
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8 | ! Former revisions: |
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9 | ! --------------------- |
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10 | ! $Id: asselin_filter.f90 484 2010-02-05 07:36:54Z maronga $ |
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11 | ! |
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12 | ! 75 2007-03-22 09:54:05Z raasch |
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13 | ! moisture renamed humidity |
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14 | ! |
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15 | ! RCS Log replace by Id keyword, revision history cleaned up |
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16 | ! |
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17 | ! Revision 1.8 2004/01/30 10:14:02 raasch |
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18 | ! Scalar lower k index nzb replaced by 2d-array nzb_2d |
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19 | ! |
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20 | ! Revision 1.1 2002/05/02 13:43:53 13:43:53 raasch (Siegfried Raasch) |
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21 | ! Initial revision |
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22 | ! |
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23 | ! |
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24 | ! Description: |
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25 | ! ------------- |
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26 | ! Time filter needed for the leap-frog method |
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27 | !------------------------------------------------------------------------------! |
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28 | |
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29 | USE arrays_3d |
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30 | USE control_parameters |
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31 | USE cpulog |
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32 | USE indices |
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33 | USE interfaces |
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34 | |
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35 | IMPLICIT NONE |
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36 | |
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37 | INTEGER :: i, j, k |
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38 | |
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39 | |
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40 | CALL cpu_log( log_point(9), 'timefilter', 'start' ) |
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41 | |
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42 | ! |
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43 | !-- Return to the calling routine, if time filter is not to be applied |
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44 | IF ( asselin_filter_factor == 0.0 ) RETURN |
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45 | |
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46 | ! |
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47 | !-- Apply the time filter |
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48 | #if defined( __ibm ) |
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49 | !$OMP PARALLEL PRIVATE (i,j,k) |
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50 | !$OMP DO |
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51 | DO i = nxl-1, nxr+1 |
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52 | DO j = nys-1, nyn+1 |
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53 | |
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54 | DO k = nzb_2d(j,i), nzt+1 |
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55 | u(k,j,i) = u(k,j,i) + asselin_filter_factor * & |
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56 | ( u_p(k,j,i) - 2.0 * u(k,j,i) + u_m(k,j,i) ) |
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57 | v(k,j,i) = v(k,j,i) + asselin_filter_factor * & |
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58 | ( v_p(k,j,i) - 2.0 * v(k,j,i) + v_m(k,j,i) ) |
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59 | w(k,j,i) = w(k,j,i) + asselin_filter_factor * & |
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60 | ( w_p(k,j,i) - 2.0 * w(k,j,i) + w_m(k,j,i) ) |
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61 | ENDDO |
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62 | |
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63 | IF ( scalar_advec /= 'bc-scheme' ) THEN |
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64 | DO k = nzb_2d(j,i), nzt+1 |
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65 | pt(k,j,i) = pt(k,j,i) + asselin_filter_factor * & |
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66 | ( pt_p(k,j,i) - 2.0 * pt(k,j,i) + pt_m(k,j,i) ) |
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67 | ENDDO |
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68 | ENDIF |
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69 | |
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70 | IF ( .NOT. constant_diffusion .AND. scalar_advec /= 'bc-scheme' ) & |
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71 | THEN |
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72 | DO k = nzb_2d(j,i), nzt+1 |
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73 | e(k,j,i) = e(k,j,i) + asselin_filter_factor * & |
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74 | ( e_p(k,j,i) - 2.0 * e(k,j,i) + e_m(k,j,i) ) |
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75 | ENDDO |
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76 | ENDIF |
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77 | |
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78 | IF ( ( humidity .OR. passive_scalar ) .AND. & |
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79 | scalar_advec /= 'bc-scheme' ) THEN |
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80 | DO k = nzb_2d(j,i), nzt+1 |
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81 | q(k,j,i) = q(k,j,i) + asselin_filter_factor * & |
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82 | ( q_p(k,j,i) - 2.0 * q(k,j,i) + q_m(k,j,i) ) |
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83 | ENDDO |
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84 | ENDIF |
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85 | |
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86 | ENDDO |
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87 | ENDDO |
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88 | !$OMP END PARALLEL |
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89 | #else |
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90 | u = u + asselin_filter_factor * ( u_p - 2.0 * u + u_m ) |
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91 | v = v + asselin_filter_factor * ( v_p - 2.0 * v + v_m ) |
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92 | w = w + asselin_filter_factor * ( w_p - 2.0 * w + w_m ) |
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93 | |
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94 | IF ( scalar_advec /= 'bc-scheme' ) THEN |
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95 | pt = pt + asselin_filter_factor * ( pt_p - 2.0 * pt + pt_m ) |
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96 | ENDIF |
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97 | |
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98 | IF ( .NOT. constant_diffusion .AND. scalar_advec /= 'bc-scheme' ) THEN |
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99 | e = e + asselin_filter_factor * ( e_p - 2.0 * e + e_m ) |
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100 | ENDIF |
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101 | |
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102 | IF ( ( humidity .OR. passive_scalar ) .AND. & |
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103 | scalar_advec /= 'bc-scheme' ) THEN |
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104 | q = q + asselin_filter_factor * ( q_p - 2.0 * q + q_m ) |
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105 | ENDIF |
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106 | #endif |
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107 | |
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108 | CALL cpu_log( log_point(9), 'timefilter', 'stop' ) |
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109 | |
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110 | END SUBROUTINE asselin_filter |
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